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Mirrors > Home > ILE Home > Th. List > tfrcldm | Unicode version |
Description: Recursion is defined on an ordinal if the characteristic function satisfies a closure hypothesis up to a suitable point. (Contributed by Jim Kingdon, 26-Mar-2022.) |
Ref | Expression |
---|---|
tfrcl.f | recs |
tfrcl.g | |
tfrcl.x | |
tfrcl.ex | |
tfrcl.u | |
tfrcl.yx |
Ref | Expression |
---|---|
tfrcldm |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | tfrcl.yx | . . 3 | |
2 | eluni 3792 | . . 3 | |
3 | 1, 2 | sylib 121 | . 2 |
4 | tfrcl.f | . . . 4 recs | |
5 | tfrcl.g | . . . . 5 | |
6 | 5 | adantr 274 | . . . 4 |
7 | tfrcl.x | . . . . 5 | |
8 | 7 | adantr 274 | . . . 4 |
9 | tfrcl.ex | . . . . 5 | |
10 | 9 | 3adant1r 1221 | . . . 4 |
11 | feq2 5321 | . . . . . . . 8 | |
12 | raleq 2661 | . . . . . . . 8 | |
13 | 11, 12 | anbi12d 465 | . . . . . . 7 |
14 | 13 | cbvrexv 2693 | . . . . . 6 |
15 | fveq2 5486 | . . . . . . . . . 10 | |
16 | reseq2 4879 | . . . . . . . . . . 11 | |
17 | 16 | fveq2d 5490 | . . . . . . . . . 10 |
18 | 15, 17 | eqeq12d 2180 | . . . . . . . . 9 |
19 | 18 | cbvralv 2692 | . . . . . . . 8 |
20 | 19 | anbi2i 453 | . . . . . . 7 |
21 | 20 | rexbii 2473 | . . . . . 6 |
22 | 14, 21 | bitri 183 | . . . . 5 |
23 | 22 | abbii 2282 | . . . 4 |
24 | tfrcl.u | . . . . 5 | |
25 | 24 | adantlr 469 | . . . 4 |
26 | simprr 522 | . . . 4 | |
27 | 4, 6, 8, 10, 23, 25, 26 | tfrcllemres 6330 | . . 3 |
28 | simprl 521 | . . 3 | |
29 | 27, 28 | sseldd 3143 | . 2 |
30 | 3, 29 | exlimddv 1886 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 w3a 968 wceq 1343 wex 1480 wcel 2136 cab 2151 wral 2444 wrex 2445 cuni 3789 word 4340 csuc 4343 cdm 4604 cres 4606 wfun 5182 wf 5184 cfv 5188 recscrecs 6272 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-13 2138 ax-14 2139 ax-ext 2147 ax-coll 4097 ax-sep 4100 ax-pow 4153 ax-pr 4187 ax-un 4411 ax-setind 4514 |
This theorem depends on definitions: df-bi 116 df-3an 970 df-tru 1346 df-fal 1349 df-nf 1449 df-sb 1751 df-eu 2017 df-mo 2018 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ne 2337 df-ral 2449 df-rex 2450 df-reu 2451 df-rab 2453 df-v 2728 df-sbc 2952 df-csb 3046 df-dif 3118 df-un 3120 df-in 3122 df-ss 3129 df-nul 3410 df-pw 3561 df-sn 3582 df-pr 3583 df-op 3585 df-uni 3790 df-iun 3868 df-br 3983 df-opab 4044 df-mpt 4045 df-tr 4081 df-id 4271 df-iord 4344 df-on 4346 df-suc 4349 df-xp 4610 df-rel 4611 df-cnv 4612 df-co 4613 df-dm 4614 df-rn 4615 df-res 4616 df-ima 4617 df-iota 5153 df-fun 5190 df-fn 5191 df-f 5192 df-f1 5193 df-fo 5194 df-f1o 5195 df-fv 5196 df-recs 6273 |
This theorem is referenced by: tfrcl 6332 frecfcllem 6372 frecsuclem 6374 |
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